【正文】 閱。 涉密論文按學(xué)校規(guī)定處理。 為確保身份鑒別的精確性、可靠性和安全性，生物特征識別技術(shù)應(yīng)運而生。發(fā)展比較成熟的指紋識別系統(tǒng)大多基于 PC 機，造價高、系統(tǒng)復(fù)雜、體積龐大，只能適用于固定場所。近年來，隨著嵌入式技術(shù)的發(fā)展，指紋識別技術(shù)的研究再次掀起高潮。 本文在閱讀大量的文獻資料的基礎(chǔ)上，對指紋圖像預(yù)處理、指紋特征提取、指紋特征匹配各環(huán)節(jié)關(guān)鍵算法進行了深入的研究，并通過仿真實驗，對各種算法的實際效果進行比較，完成圖像算法的設(shè)計。 實驗結(jié)果表明該系統(tǒng)的運行速度和識別準(zhǔn)確率都達到了 理想的效果 ，并 在 20xx年浙江省高考閱卷浙江工業(yè)大學(xué)閱卷點安保工作中 成功 應(yīng)用。 it is accurate, reliable and also secure. Because fingerprint is unique and fingerprint identification technology is feasibility and practicability, fingerprint identification has bee one of the most popular and convenient identification technology. The relativelymature Fingerprint identification system are PCbased、 high cost and plex, its size is huge and can only be applicable to fixed location. In the last few years, with the development of embedded technology. Fingerprint identification technology research became hot again. Embedded processor with high ability is introduced into the AFIS, it not only reduces the price, but also improves the performance of the system. Lots of articles about the AFIS were read, key arithmetic of fingerprint image preprecess、 fingerprint minutiae extraction and fingerprint minutiae matching were discussed. Practical results of arithmetic were analyzed though simulation, after that, image arithmetic was designed. LTTSS500, a fingerprint sensor which is small, cheap and low power consumption is introduced into the fingerprint capturing the same time, new arithmetic based on distant which adapt to scratch fingerprint sensor was put forward. This arithmetic can capture the displacement of the fingerprint using the information contained in the pels of the sensor, it can also resume the fingerprint image without any crossover. By using TMS320VC5509 DSP, a new fingerprint system was designed which can either be used separately or be embedded in other products. The result of the experiment shows that the system’s operation speed and the accuracy rate of identifying have all reached the ideal targets, and successfully put in use of security applications of zhejiang industry university branch, one of the 20xx Zhejiang university entrance examination examines test papers spot. Key words: fingerprint sweep sensor, image reconfigument, DSP, fingerprint identification Ⅱ 目 錄， 2 目 錄 第一章 緒 論 ....................................................................................................................1 引言 ......................................................................................................................1 生物特征識別技術(shù) ..............................................................................................2 生物特征識別技術(shù)的特點 .......................................................................2 各種生物識別技術(shù)的比較 .......................................................................2 自動指紋識別技術(shù) ...................................................................................3 指紋識別技術(shù)的發(fā)展現(xiàn)狀 ..................................................................................4 課題的目的和意義 ..............................................................................................5 本文研究的主要內(nèi)容和結(jié)構(gòu)安排 ......................................................................5 第二章 自動指紋識別原理與算法設(shè)計 ..........................................................................7 指紋識別系統(tǒng)的算法結(jié)構(gòu) ..................................................................................7 指紋特征介紹 ......................................................................................................8 指紋圖像預(yù)處理 ................................................................................................11 指紋圖像增強 .........................................................................................12 方向圖計算 .............................................................................................13 二值化處理 .............................................................................................15 細(xì)化處理 .................................................................................................16 指紋特征提取 ....................................................................................................17 指紋特征匹配 ....................................................................................................17 性能評價 ............................................................................................................18 本章小結(jié) ............................................................................................................19 第三章 系統(tǒng)設(shè)計方案 ....................................................................................................20 嵌入式指紋識別系統(tǒng)概況 ................................................................................20 需求分析 ............................................................................................................20 基于 DSP 的系統(tǒng)構(gòu)成 ......................................................................................21 DSP 芯片 ............................................................................................................21 DSP 芯片選型 .........................................................................................21 TMS320VC5509 的結(jié)構(gòu)性能 .................................................................23 引導(dǎo)方式 ............................................................................................................25 本章小結(jié) ............................................................................................................26 第四章 滑動 式指紋傳感器與圖像重 組算法 ..................................................................27 指紋傳感器概述 ................................................................................................27 活體指紋傳感器 .....................................................................................27 Ⅲ 目 錄 指紋輸入方法 .........................................................................................28 滑動 式指紋傳感器 LTTS